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Conference Paper: Soft MCI cancellation for turbo-coded OFCDM systems

TitleSoft MCI cancellation for turbo-coded OFCDM systems
Authors
KeywordsCommunications
Issue Date2006
PublisherIEEE, Communications Society.
Citation
Ieee Wireless Communications And Networking Conference, Wcnc, 2006, v. 3, p. 1561-1566 How to Cite?
AbstractIn this paper, the performance of turbo-coded orthogonal frequency and code division multiplexing (OFCDM) systems is investigated with soft multi-code interference (MCI) cancellation. To regenerate the soft interference signal, the conventional turbo decoding algorithm must be modified to provide log likelihood ratio (LLR) values for all coded bits. Based on the LLR outputs of turbo decoder, two soft decision functions are proposed, called LLR-soft-decision and Gaussiansofi-decision functions. By means of computer simulations, the performance of soft MCI cancellation is studied extensively and compared to that of hard ones. It is shown that in a highly frequency selective channel, the proposed soft decision functions outperform the hard decision function with various channel conditions and system parameters. Furthermore, the Gaussian-soft-decision function provides better performance than the LLR-soft-decision function. © 2006 IEEE.
Persistent Identifierhttp://hdl.handle.net/10722/45887
ISSN
References

 

DC FieldValueLanguage
dc.contributor.authorZhou, Yen_HK
dc.contributor.authorWang, Jen_HK
dc.date.accessioned2007-10-30T06:37:46Z-
dc.date.available2007-10-30T06:37:46Z-
dc.date.issued2006en_HK
dc.identifier.citationIeee Wireless Communications And Networking Conference, Wcnc, 2006, v. 3, p. 1561-1566en_HK
dc.identifier.issn1525-3511en_HK
dc.identifier.urihttp://hdl.handle.net/10722/45887-
dc.description.abstractIn this paper, the performance of turbo-coded orthogonal frequency and code division multiplexing (OFCDM) systems is investigated with soft multi-code interference (MCI) cancellation. To regenerate the soft interference signal, the conventional turbo decoding algorithm must be modified to provide log likelihood ratio (LLR) values for all coded bits. Based on the LLR outputs of turbo decoder, two soft decision functions are proposed, called LLR-soft-decision and Gaussiansofi-decision functions. By means of computer simulations, the performance of soft MCI cancellation is studied extensively and compared to that of hard ones. It is shown that in a highly frequency selective channel, the proposed soft decision functions outperform the hard decision function with various channel conditions and system parameters. Furthermore, the Gaussian-soft-decision function provides better performance than the LLR-soft-decision function. © 2006 IEEE.en_HK
dc.format.extent321575 bytes-
dc.format.extent1801 bytes-
dc.format.extent2198 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
dc.format.mimetypetext/plain-
dc.languageengen_HK
dc.publisherIEEE, Communications Society.en_HK
dc.relation.ispartofIEEE Wireless Communications and Networking Conference, WCNCen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectCommunicationsen_HK
dc.titleSoft MCI cancellation for turbo-coded OFCDM systemsen_HK
dc.typeConference_Paperen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1525-3511&volume=3&spage=1561&epage=1566&date=2006&atitle=Soft+MCI+cancellation+for+turbo-coded+OFCDM+systemsen_HK
dc.identifier.emailZhou, Y:yqzhou@eee.hku.hken_HK
dc.identifier.authorityZhou, Y=rp00214en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1109/WCNC.2003.1200619en_HK
dc.identifier.scopuseid_2-s2.0-34250380000en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34250380000&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume3en_HK
dc.identifier.spage1561en_HK
dc.identifier.epage1566en_HK
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridZhou, Y=7405367062en_HK
dc.identifier.scopusauthoridWang, J=36026110700en_HK

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